Inventors:
Anglis R. Briggs - Newark DE
Thomas J. Maxwell - Philadelphia PA
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
F26B 506
Abstract:
Disclosed herein is a homogeneous, lyophilized particulate product of a substance containing at least one biologically active component and a process for its preparation which involves forming a solution or colloidal suspension of the substance, spraying the solution or colloidal suspension into a moving bath of fluorocarbon refrigerant and lyophilizing the resultant frozen droplets. The porous product has a spherical shape, free-flowing properties, and rapid dissolution times.